Electron Microscope Mystery 7Posted: May 6, 2013
It’s time for another microscope mystery!
The field of view here is about a millimeter. What is it?
Update, 4:50p: This is proving to be a tricky one! Here’s a zoomed-out view.
Update, 5:02p: Hooray! @poikiloblastic guessed right, it’s a key.